31968534 has 32 divisors (see below), whose sum is σ = 72908640. Its totient is φ = 9257472.

The previous prime is 31968523. The next prime is 31968553. The reversal of 31968534 is 43586913.

It is a super-2 number, since 2×31968534² = 2043974332218312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 31968492 and 31968501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10729 + ... + 13380.

It is an arithmetic number, because the mean of its divisors is an integer number (2278395).

Almost surely, 2^31968534 is an apocalyptic number.

31968534 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

31968534 is an abundant number, since it is smaller than the sum of its proper divisors (40940106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31968534 is a wasteful number, since it uses less digits than its factorization.

31968534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24144.

The product of its digits is 77760, while the sum is 39.

The square root of 31968534 is about 5654.0723377049. The cubic root of 31968534 is about 317.3761155138.

The spelling of 31968534 in words is "thirty-one million, nine hundred sixty-eight thousand, five hundred thirty-four".